🌟Important Increasing Orders

1️⃣ Ionization Energy

(i) Na, Al, Mg, Si
(ii) Li, B, Be, C, O, N, F, Ne, He (Ist I.P.)
(iii) Be, C, B, N, F, O, Ne, He, Li (IInd I.P.)

2️⃣ Electron Affinity

(i) I, Br, F, Cl
(ii) Cu, Ag, Au (EA, of Au is very high = 222 kJ mol–1)
(iii) O, S, F, Cl
(iv) N, P, O, S

3️⃣ Electronegativity

(i) As, P, S, Cl
(ii) I, Br, Cl, F
(iii) C, N, O, F

4️⃣ Oxyacids Of Halogen

1. Hypochlorous acid- HClO
2. Chlorous acid - HClO2
3. Chloric acid - HClO3
4. Perchloric acid - HClO4

5️⃣ Acidic  Strength

HClO < HClO2 < HClO3 < HClO4

6️⃣ Oxidising Nature

HClO > HClO2 > HClO3 > HClO4